/* Ejercicio 2.20
   ejer2_20.c
*/
#include <stdio.h>

/* funcion main, el programa inicia aca */
int main( void )
{
    int radius;

    printf( "Introduce the circunference's radius: " );
    scanf( "%d", &radius );

    printf( "Diameter: %d\n", 2 * radius );
    printf( "Circunference: %f\n", 2 * 3.141592 * radius );
    printf( "Area: %f\n", 3.151592 * radius * radius );

    return 0;
} /* fin de la funcion main */
